Superheater boiler



April 1931. P. A. BANCEL SUPERHEATER BOILER 3 Sheets-Sheei Filed April 6, 1922 INVENTOR FM CL flaws/Z.

%w6-4Q ATTORNEY$ April 14, 1931. P, BANCEL 1,801,251

SUPERHEATER BOILER Filed April 6, 1922 3 Sheets-Sheet 2 s as 22322 as as a2 as 22 28 ms 32 INVENTOR yauewq ATTORNEY April 14, 1931- P. A. BANCEL SUPERHEATER BOILER Filed April 6, 1922 5 Sheets-Shee 5- INVENTOR.

ATTORNEYS Patented Apr. f4, 1931 UNITED STATES PATENT OFFICE PAUL A. BANCEL, OF N'U'ILEY, NEW JERSEY, ASSIGNOR TO THE BABCOGK do WILCOX COMPANY, OF BAYONNE, NEW JERSEY, A CORPORATION OF NEW JERSEY SUPERHEATER BOILER Application filed April 6,

My present invention relates to boilers provided with superheaters and will be best understood from the following description and the annexed drawings, in which Figure 1 is a vertical elevation, partly in section, of an illustrative type of boiler embodying my invention, taken on line 11 of Fig. 2; Fig.

2 is a section on the line 2-2 of Fig. 1, and Fig. 3 is a section on line 33 of Fig. 1, with some of the parts omitted.

For purposes of illustration of my present invention, I have adopted a well-known form of water tube boiler having uptake headers 10 and downtake headers 11 connected to a steam and water drum 12 and having rows of horizontally inclined water tubes spaced apart to form an upper bank 13 and a lower bank 14, the headers at the ends of these banks being connected by nipples in the usual manner. A longitudinal bafile 15 extends along the lowermost row 14 of the tubes 14 from the downtake headers 11 toward the uptake headers 10 but stopping short thereof to provide a gas passage between the uptake headers 10 and a cross bafiie 16 extending from the left-hand end of the longitudinal bathe 15. A second cross bathe 17 is provided, as usual, which has a continuation 18 leading to a main gas outlet 19.' A. second longitudinal bafiie 20 is supported on the lowermost row 13 of tubes of the bank 13 and extends from the downtake headers 11 to the cross bathe 16. The longitudinal baflies 15 and 20 and the lower portion of the cross baflle 16 form asuperheater chamber in which is located a superheater having U-tubes 21 extending through the nipples connecting the upper and lower downtake headers with the headers 22 and 23 of the superheater located, in the form shown, outside of the downtake headers. The baflies 15, 16, 17 and 20 extend across the entire boiler setting and the baiiie 15 is provided with an opening 2 1 at one side of the setting adjacent the cross bafile 16, and the upper longitudinal bafile 20 is provided with a similar opening 25 at the opposite side of the setting and adjacent the downtake headers 11. A'wall 26 extends parallel with the water tubes from the inner edge of the opening 25, as shown in Fig. 2, up into the 1922. Serial No. 550,034.

main gas outlet 19 and to the left of Fig. 1 to the cross bathe 17 and the flue plate 18. This plate 26 divides the entrance to the main gas flue 19 into two parts, one having a damper 27 and the other a dam or 28.

When the illustrative form 0 my invention is in operation, the furnace gases may be divided so that some of them will flow substantially directly from the fire through the opening 24 and then across the superheater tubes 21 to the opening 25 and from thence up the flue formed by the side wall of the setting and the wall 26, past the damper 27 to the main gas outlet 19. The dotted arrows on the figures indicate this direction of flow. After passing through the superheater chamber, the gases will flow over some of the water tubes at the end adjacent the downtake headers 11 in the part defined by the cross baflie 17, the vertical wall 26, the downtake headers 11 and the side wall of the setting.

The remainder of the gases will flow up through the first pass defined by the cross bafiie 16 and the uptake headers 10 and from thence down across the middle of the up er bank 13 of the water tubes and thence un er the lower end of baflie 17 up to the main gas outlet 19, across the ends of some of the water tubes, through the space defined by the left-hand wall of the setting, as shown in Fig. 2, and the vertical wall 26, the damper 28 controlling the flow of the gases from this pass into the main gas outlet 19. The bafiie 17 extends down to baffle 20 at the right of the wall 26 in Fig. 2, (as indicated in dotted lines in Fi 1) but terminates above baflie 20 at the le t of wall 26 in Fig. 2, as shown in Fig. 1. The full line arrows in the figures indicate the direction of flow of this remainder of the gases. The position of the dampers 27 and 28 will obviously regulate and control the proportion of the gases which flow through the superheater chamber and over the superheater.

It will be noted that in the illustrative form of boiler, hot gases will be taken directly from the furnace chamber and passed directly across the superheater after contacting with only one or two rows of water tubes,

and yet by operating the damper 27, the'quantity of such ases may be directly controlled so that the diagree of superheat may be correspondingly controlled. The gases are taken, in the form shown, from one side of the furnace and passed out through the opposite side of the boiler through a flue which directs them to the main gas outlet. By passing the gases from the superheater chamber over water tubesurface before reaching the main gas outlet, the heat remaining in the gases as they leave the superheater chamber may be utilized.

I claim 1. In combination, a water tube boiler havf ing horizontally inclined water tubes divided into banks, a superheater chamber between the banks, a superheater in said chamber, a-

main gas outlet and cross baflles forming passes to direct gases back and forth across the water tubes to the main gas outlet, said chamber having an inlet and an outlet arranged to permit some of the gases to flow through the chamber, and a flue disposed in ranged to permit some of the gases to flow through the chamber, and a flue disposed in one of said passes and connecting said chamber outlet to the main gas outlet and dampers adapted to control the passage of gases through said outlets.

3. In combination, a water tube boiler having horizontally inclined water tubes divided into banks, a superheater chamber between the banks, a superheater in said chamber, a

ng horizontally inclined water tubes divided main gas outlet and cross baflies forming passes to direct gases back and forth across the Water tubes to the main gas outlet, said chamber having an inlet and an outlet ar ranged to permit some of the gases to flow through the chamber and a flue extending through the upper bank of water tubes and connecting said chamber outlet with the main gas outlet above the water tubes, said flue having a portion only of the length of the.

the end of said chamber and back and forth across the water tubes to the main gas out-' let, said chamber ,having an inlet and an out- 'the banks and' extending along the water tubes from one end for a portion of the length thereof, a superheater in said chamber, a main gas outlet and cross bafiles arranged in connection with the walls of said chamber to form passes to direct gases around the end of said chamber and back and forth across the water tubes to the main gas outlet, said chamber having an inlet and an outlet arranged to permit some of the gases to flow through the chamber, a flue disposed in one of said passes and connecting said outlets, and a damper in said flue to control the flow of gases through said chamber.

6. In combination, a water tube boiler having horizontally inclined water tubes divided into banks, a superheater chamber between the banks andextending from side to side of the boiler and along the water tubes from one end for a portion of the length thereof, a superheater in said chamber, a main gas outlet, and cross baffles arranged in connection with the walls of said chamber to direct gases around the end of said chamber and back and forth in passes across the water tubes to the main gas outlet, said chamber having a gas inlet in its bottom wall at one side of the setting and a gas outlet in its top wall at the other side of the-setting, whereby gases may pass crosswise of the chamber and a flue connecting said superheater chamber gas outlet to the main gas outlet above the water tubes.

7. In combination, a water tube boiler havinto banks, a superheater chamber between the banks and extending from side to side of the boiler and along the water tubes from one end for a portion of the length thereof, a superheater in said chamber, a main gas outlet, and cross baflles arranged in connection with the walls of said chamber to direct gases around the end of said chamber and back and forth in passes across the water tubes to the main gas" outlet, said chamber having a gas inlet in its bottom wall at one side of the setting and a gas outlet in itstop wall at the other side of the setting, whereby gases'may pass crosswise of the chamber, a flue disposed in one of said passes and connecting said superheater chamber gas outlet to the main gas outlet above the Water tubes, and a damper located in said flue near its connection to said main gas outlet.

8. In combination, a water tube boiler having horizontally inclined water tubes divided into banks, a superheater chamber between the banks and extending along the water tubes from one end for a portion of the length thereof, a superheater in said chamber, a main gas outlet and cross baflies arranged in connection with the walls of said chamber to direct gases around the end of said chamber and back and forth in passes across the water tubes to the main gas outlet, said chamber having openings arranged to permit some of the gases to flow through the chamber, a flue disposed in one of said passes and connecting said chamber outlet to the main gas outlet above the water tubes, a damper located in said flue near its connection to said main gas outlet, and a main damper adjacent the main gas outlet to control the flow of gases over said water tubes, the flow of gases across the water tubes being unobstructed by controlling means between the furnace and said main damper.

9. In combination, a Water tube boiler having horizontally inclined water tubes divided into banks, a superheater chamber between the banks, and extending from side to side of the boiler and along the water tubes from one end fora portion of the length thereof, a superheater in said chamber, a'main gas outlet, and cross baffles arranged in, connection with the walls of said chamber to direct gases around the end of said chamber and back and forth in passes across the water tubes to the main gas outlet, said chamber having a gas inlet in its bottom wall at one side of the setting and a gas outlet in its top wall at the other side of the setting, and a flue extending through the upper bank of water tubes and connecting the main gas outlet with the superheater chamber gas outlet, some only of the water tubes of the upper bank extending across said flue.

10. In combination, a water tube boiler having horizontally inclined water tubes divided into banks, a superheater chamber between the banks, and extending from side to side of the boiler and along the water tubes from one end of a portion of the length thereof, a superheater in said chamber, a main gas outlet, cross baffles arranged in connection with the walls of said chamber to direct gases around the end of said chamber and back and forth in passes across the water tubes to the main gas outlet, said chamber having a gas inlet in its bottom wall at one sideof the setting and a gas outlet in 1ts top wall at the other side of the settlng, a flue extending through the upper bank of water tubes and connecting the main gas outlet wlth the superheater chamber gas outlet, some only of the water tubes of the upper bank extending across said flue, and a damper in said flue to control the flow of gases through said chamber.

11. In combination, a water tube boiler having rows of horizontally inclined water tubes connected to water chambers at either end, a superheater chamber located between the top and the bottom rows, said chamber extending from side to side of the boiler and from one water chamber toward the other, with a gas passage between its end and the other chamber, a main gas outlet and baflies to direct gases passing around the end of said chamber back and forth across the water tubes above the chamber to the main gas outlet, said chamber having a gas inlet in its bottom Wall at one side of the setting and a gas outlet in its top wall at the opposite side of the setting, and a flue extending through the tubes above said'chamber and connecting the gas outlet of the chamber with the main gas outlet. v

12. In combination, a water tube boiler having rows of horizontally inclined water tubes connected to water chambers at either end, a superheater chamber located between the top and the bottom rows, said chamber extending from side to side of the boiler and from one water chamber toward the other, with a gas passage between its end and the other chamber, a main gas outlet, baflles to direct gases passing around the end of said chamber back and forth across the water tubes above the chamber to the main gas outlet, said chamber having a gas inlet in its bottom wall at one side of the setting and a gas outlet in its top wall at the opposite side of the setting, and a flue extending through the tubes above said chamber and connecting the gas outlet of the chamber with the main gas outlet, and a damper to control the flow of gases through said chamber.

13. In a steam boiler, a bank of water tubes, a, superheater chamber, a superheater in said chamber, means forming passes to direct furnace gases into contact with said water tubes,

said chamber having an inlet and an outlet arranged to permit some of the furnace gases to flow through the chamber, and a flue forming part of one of said passes and connecting said chamber outlet with the main gas outlet.

14;. In a steam boiler, a bank of horizontally disposed water tubes, 9. superheater chamber beneath said bank and having an inlet and an outlet for gases, a main gas outlet above said bank, a vertical dividing wall passing longitudinally through said bank and forming part of a flue connecting said outlets, and a damper in said flue.

15. In a steam boiler, a bank of horizontally disposed water tubes, a superheater chamber beneath said bank and having an inlet and an outlet for gases, a main gas outlet above said bank, means forming a vertical pass for gases across said bank, and two parallel fines, one connecting said outlets and the other connecting the main gas outlet with said pass.

16. In a steam boiler, an outlet for gases,

- a pair of paths either of which said gases may follow to said outlet, a bank of tubes disposed in one of said paths, a superheater and a plurality of tubes of the same bank disposed in the other path, and means for regulating the flow of gases through said paths.

- PAUL A. BANCEL. 

